One arrest has been made in the shooting death of a Houston food truck owner who was gunned down in his truck earlier this month while his wife looked on, according to the Harris County Sheriff's Office.

John Aycock, 37, has been arrested and charged with capital murder in the Oct. 12 shooting death of Lorenzo Juan Vasquez, who was killed inside his mobile food truck. The truck was parked next to a Shell station at 8110 Fairbanks North Houston near Breen.

Aycock is currently in the Harris County Jail being held without bond.

A second suspect, Adrian Gomez, 21, is wanted for capital murder and investigators are actively looking for him.

Police said Aycock told them that Gomez was the triggerman in the Vasquez slaying and that he was a lookout, placing an order at the truck window while Gomez climbed inside Vasquez's mobile kitchen.

Officials said Aycock also stated to investigators that Vasquez being shot was not "part of the plan" the pair had for the robbery. There was no money taken during the course of the attempted robbery.

According to the Harris County complaint filed Oct. 18, Vasquez struggled with Gomez during the attempted robbery, with Gomez fatally shooting Vasquez in the head.

Vasquez, 53, and his wife had owned the mobile taqueria about a year, but they had hoped to open a Mexican and El Salvadoran restaurant sometime in the future. She was not injured in the incident. She was able to identify her husband's shooter in a photo lineup.

An anonymous Crime Stoppers tip has led police to an apartment complex where a man fitting Gomez's description had been residing.

Police said Aycock admitted to helping Gomez rob a similar a mobile truck in the area four hours before the Vasquez shooting. Both men could be seen in surveillance footage from that robbery.

Anyone with information about the whereabouts of Adrian Gomez is asked to contact Crime Stoppers at 713-222-TIPS (8477).